Hawking, one of _____most famous scientists, passed away in March.( )
A.aB.anC.theD.不填
Professor Tu Youyou never stops doing research on Chinese medicine,______?( )
is she
does she
isn't she
doesn't she
The two companies decided to work together ______ they had common interest.( )
because
unless
but
or
______ I park my car here for a while?
No,you mustn't.Do you see the sign"NO PARKING"?( )
Would
May
Must
Should
The workers are busy _______ windows to the new building these days.( )
fix
fixed
fixing
to fix
Vivian refuses ______ her children to the weekend training centre for extra classes.( )
to send
sending
sent
sends